ProsmORF-pred
Result : P0C077
Protein Information
Information Type Description
Protein name mRNA interferase toxin RelE (EC 3.1.-.-) (Endoribonuclease RelE) (Toxin RelE)
NCBI Accession ID X02405.1
Organism Escherichia coli (strain K12)
Left 733
Right 1020
Strand +
Nucleotide Sequence ATGGCGTATTTTCTGGATTTTGACGAGCGGGCACTAAAGGAATGGCGAAAGCTGGGCTCGACGGTACGTGAACAGTTGAAAAAGAAGCTGGTTGAAGTACTTGAGTCACCCCGGATTGAAGCAAACAAGCTCCGTGGTATGCCTGATTGTTACAAGATTAAGCTCCGGTCTTCAGGCTATCGCCTTGTATACCAGGTTATAGACGAGAAAGTTGTCGTTTTCGTGATTTCTGTTGGGAAAAGAGAACGCTCGGAAGTATATAGCGAGGCGGTCAAACGCATTCTCTGA
Sequence MAYFLDFDERALKEWRKLGSTVREQLKKKLVEVLESPRIEANKLRGMPDCYKIKLRSSGYRLVYQVIDEKVVVFVISVGKRERSEVYSEAVKRIL
Source of smORF Swiss-Prot
Function Toxic component of a type II toxin-antitoxin (TA) system (Pubmed:9767574). A sequence-specific, ribosome-dependent mRNA endoribonuclease that inhibits translation during amino acid starvation (the stringent response). In vitro acts by cleaving mRNA with high codon specificity in the ribosomal A site between positions 2 and 3. The stop codon UAG is cleaved at a fast rate while UAA and UGA are cleaved with intermediate and slow rates. In vitro mRNA cleavage can also occur in the ribosomal E site after peptide release from peptidyl-tRNA in the P site as well as on free 30S subunits (Pubmed:12526800). In vivo cuts frequently in the first 100 codons, most frequently after the second and third base and rarely near the stop codon (Pubmed:21324908). Overexpression of RelE results in the inhibition of bacterial growth and a sharp decrease in colony-forming ability which is neutralized by the labile cognate antitoxin RelB. Overexpression also sharply increases persisters (cells that neither grow nor die in the presence of bactericidal agents and are largely responsible for high levels of biofilm tolerance to antimicrobials) (Pubmed:15576765). mRNA interferases play a role in bacterial persistence to antibiotics; overexpression of this protein induces persisters resistant to ciprofloxacin and ampicillin (Pubmed:21788497). Plays a role in dormancy when expressed in high-density cells in the absence of antitoxin RelB; amino acid starvation and an unidentified extracellular factor promote dormancy, while expression of antitoxin RelB restores cell culturability (Pubmed:22210768). Acts with RelB as a corepressor of relBE transcription, considerably increasing the repression of RelB alone. 2 RelB dimers bind to 2 operator sequences; DNA-binding and repression is stronger when complexed with toxin/corepressor RelE by conditional cooperativity (Pubmed:9767574, Pubmed:19747491, Pubmed:18501926, Pubmed:22981948). {ECO:0000269|Pubmed:11274135, ECO:0000269|Pubmed:11717402, ECO:0000269|Pubmed:12123459, ECO:0000269|Pubmed:12526800, ECO:0000269|Pubmed:15576765, ECO:0000269|Pubmed:18501926, ECO:0000269|Pubmed:18532983, ECO:0000269|Pubmed:19747491, ECO:0000269|Pubmed:20005802, ECO:0000269|Pubmed:21324908, ECO:0000269|Pubmed:21788497, ECO:0000269|Pubmed:22210768, ECO:0000269|Pubmed:22981948, ECO:0000269|Pubmed:24251350, ECO:0000269|Pubmed:9767574}.; Seems to be a principal mediator of cell death in liquid media (Pubmed:19707553). Implicated in hydroxy radical-mediated cell death induced by hydroxyurea treatment (Pubmed:20005847). {ECO:0000269|Pubmed:19707553, ECO:0000269|Pubmed:20005847}.; Cross-talk can occur between different TA systems. Ectopic expression of this toxin induces transcription of 7 tested TA systems (dinJ/yafQ, hicAB, mazEF, mqsRA, prlF(sohA)/yhaV, relBEF and yefM/yoeB) with specific cleavage of the relBEF mRNA produced immediately upstream and within the relB coding sequence. The cleaved mRNA can be translated into RelE, leading to a positive feedback cycle of RelE expression. The relBEF operon is required for transcription of the mazEF TA system operon during amino acid starvation. {ECO:0000269|Pubmed:23432955}.
Pubmed ID 2990907 9097039 9278503 16738553 9767574 11274135 11717402 12123459 12526800 15576765 19707553 18501926 18532983 19747491 20005847 21324908 21788497 22210768 23432955 24251350 19215780 20005802 19297318 22981948
Domain CDD:419697
Functional Category RNA-binding_and_Toxin_type_2
Uniprot ID P0C077
ORF Length (Amino Acid) 95
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Conservation Analysis
Conservation Analysis
No. of Species: 190
Sr.No. Left Position Right Position Strand NCBI Accession id Species Name
1 58770 59057 - NZ_CP011600.1 Phytobacter ursingii
2 25884 26171 - NZ_CP011601.1 Phytobacter ursingii
3 240462 240749 - NZ_CP061512.1 Mixta calida
4 1581699 1581986 - NC_004337.2 Shigella flexneri 2a str. 301
5 1645346 1645633 - NC_000913.3 Escherichia coli str. K-12 substr. MG1655
6 2721975 2722262 + NZ_CP050508.1 Raoultella terrigena
7 1493177 1493464 + NC_017910.1 Shimwellia blattae DSM 4481 = NBRC 105725
8 91652 91939 + NZ_CP033743.1 Citrobacter freundii
9 2893832 2894119 - NZ_CP054058.1 Scandinavium goeteborgense
10 1790363 1790656 - NZ_CP027756.1 Pseudomonas synxantha
11 3991381 3991671 + NZ_CP009365.1 Pseudomonas soli
12 115170 115457 - NZ_CP034150.1 Pantoea agglomerans
13 150743 151030 + NZ_CP034150.1 Pantoea agglomerans
14 6063711 6064013 + NZ_CP014870.1 Pseudomonas silesiensis
15 91546 91827 + NZ_CP014870.1 Pseudomonas silesiensis
16 2216668 2216955 - NZ_CP031146.1 Pseudomonas plecoglossicida
17 541529 541813 + NZ_CP063425.1 Kosakonia pseudosacchari
18 4052290 4052574 + NC_015554.1 Alteromonas naphthalenivorans
19 4540314 4540601 - NZ_CP022562.1 Pseudomonas monteilii
20 3528032 3528316 - NZ_CP022562.1 Pseudomonas monteilii
21 2721750 2722034 + NZ_CP023567.1 Erwinia pyrifoliae
22 2729399 2729683 + NZ_CP023567.1 Erwinia pyrifoliae
23 533081 533365 - NZ_CP023567.1 Erwinia pyrifoliae
24 525432 525716 - NZ_CP023567.1 Erwinia pyrifoliae
25 981267 981554 + NZ_CP023567.1 Erwinia pyrifoliae
26 5312836 5313120 + NZ_CP014782.1 Shewanella psychrophila
27 1744623 1744907 - NZ_LR134494.1 Serratia quinivorans
28 488755 489039 + NZ_AP022508.1 Enterobacter bugandensis
29 1339995 1340282 - NZ_CP020388.1 Pluralibacter gergoviae
30 762334 762618 + NZ_CP047495.1 Pectobacterium brasiliense
31 1485246 1485533 + NZ_CP047495.1 Pectobacterium brasiliense
32 1083321 1083605 + NZ_CP051652.1 Pectobacterium carotovorum
33 4753144 4753431 + NZ_CP051652.1 Pectobacterium carotovorum
34 2260622 2260906 + NZ_CP015750.1 Pectobacterium wasabiae CFBP 3304
35 2152573 2152860 + NZ_CP015750.1 Pectobacterium wasabiae CFBP 3304
36 3306319 3306603 + NZ_CP014137.1 Brenneria goodwinii
37 6119030 6119320 - NC_004578.1 Pseudomonas syringae pv. tomato str. DC3000
38 4272100 4272384 + NZ_CP017482.1 Pectobacterium polaris
39 3850459 3850746 - NZ_CP017482.1 Pectobacterium polaris
40 4152418 4152705 + NZ_CP017482.1 Pectobacterium polaris
41 347267 347554 - NZ_CP007030.1 Thiomicrospira aerophila AL3
42 4784 5065 - NC_013718.1 Citrobacter rodentium ICC168
43 3023273 3023557 - NZ_CP045769.1 Enterobacter cancerogenus
44 1996659 1996988 + NZ_LR134167.1 Avibacterium volantium
45 1066371 1066655 + NZ_CP034036.1 Brenneria nigrifluens DSM 30175 = ATCC 13028
46 3688857 3689171 - NZ_CP068551.1 Pseudomonas khazarica
47 845322 845645 - NZ_AP022642.1 Pseudomonas otitidis
48 5760706 5760996 - NZ_CP068034.2 Pseudomonas syringae
49 316801 317088 - NZ_CP060009.1 Pseudomonas sediminis
50 807290 807574 - NZ_CP009125.1 Pectobacterium atrosepticum
51 78934 79221 - NZ_CP009125.1 Pectobacterium atrosepticum
52 3688682 3688966 + NZ_CP016337.1 Kosakonia sacchari
53 3299014 3299298 + NZ_CP071320.1 Serratia ureilytica
54 1751468 1751752 - NZ_CP038662.1 Serratia nematodiphila
55 1892223 1892507 + NZ_CP037952.1 Parashewanella spongiae
56 2285829 2286113 + NZ_CP037952.1 Parashewanella spongiae
57 509945 510229 + NZ_CP027986.1 Enterobacter sichuanensis
58 4136017 4136301 - NZ_CP035129.1 Kosakonia cowanii
59 4813920 4814204 - NZ_CP014007.2 Kosakonia oryzae
60 3418043 3418333 + NZ_CP057657.1 Escherichia fergusonii
61 2913052 2913354 + NZ_CP061511.1 Mixta calida
62 4030425 4030712 + NZ_CP027107.1 Cronobacter sakazakii
63 3128571 3128861 + NC_012691.1 Tolumonas auensis DSM 9187
64 612709 612990 + NC_012691.1 Tolumonas auensis DSM 9187
65 374447 374734 + NZ_CP056030.1 Pseudomonas eucalypticola
66 582342 582632 - NZ_AP021889.1 Thiosulfatimonas sediminis
67 1824639 1824923 - NZ_AP021889.1 Thiosulfatimonas sediminis
68 2674073 2674363 + NC_002939.5 Geobacter sulfurreducens PCA
69 3271577 3271861 + NZ_CP033744.1 Citrobacter freundii
70 1846575 1846865 + NZ_CP032093.1 Vibrio alfacsensis
71 1803008 1803298 + NZ_CP044069.1 Vibrio vulnificus
72 85258 85548 - NZ_CP025792.1 Vibrio jasicida 090810c
73 5429526 5429816 - NZ_CP071706.1 Pseudomonas donghuensis
74 1547962 1548246 + NZ_CP061202.1 Rhodobacter capsulatus
75 347066 347356 - NZ_CP014055.2 Grimontia hollisae
76 492967 493257 - NZ_LT960611.1 Vibrio tapetis subsp. tapetis
77 75562 75843 + NZ_CP039701.1 Vibrio cyclitrophicus
78 1745777 1746058 + NZ_CP039700.1 Vibrio cyclitrophicus
79 3590975 3591259 + NZ_CP017279.1 Enterobacter ludwigii
80 777632 777883 + NZ_CP061081.1 Marinomonas arctica
81 2669698 2669985 + NZ_CP061081.1 Marinomonas arctica
82 860243 860560 + NZ_LR215729.2 Pseudomonas marincola
83 2070500 2070784 - NZ_CP070624.1 Photobacterium damselae subsp. damselae
84 777506 777796 - NZ_AP014636.1 Vibrio tritonius
85 776125 776415 - NZ_AP014636.1 Vibrio tritonius
86 1247102 1247392 - NZ_AP019657.1 Vibrio ponticus
87 1585901 1586185 - NC_011312.1 Aliivibrio salmonicida LFI1238
88 1141981 1142265 + NZ_CP045205.1 Citrobacter telavivensis
89 4691698 4691982 + NC_003197.2 Salmonella enterica subsp. enterica serovar Typhimurium str. LT2
90 1626558 1626842 - NC_003197.2 Salmonella enterica subsp. enterica serovar Typhimurium str. LT2
91 34810 35106 - NZ_CP023525.1 Cedecea neteri
92 5296562 5296843 + NZ_CP014205.2 Pseudomonas glycinae
93 1171433 1171717 - NZ_LR134378.1 Lautropia mirabilis
94 816871 817194 + NZ_CP030241.1 Moraxella bovis
95 1006014 1006322 - NZ_CP030241.1 Moraxella bovis
96 2965037 2965324 - NZ_CP072844.1 Psychrosphaera aestuarii
97 2752263 2752553 + NZ_CP011078.1 Yersinia ruckeri
98 313631 313921 - NZ_CP016415.1 Vibrio scophthalmi
99 5242312 5242599 + NZ_CP049044.1 Pseudomonas psychrophila
100 22056 22343 - NZ_CP045299.1 Kosakonia arachidis
101 1281255 1281539 + NC_017187.1 Aliarcobacter butzleri ED-1
102 3363324 3363611 - NZ_CP046293.1 Yersinia intermedia
103 2966926 2967216 + NZ_CP029640.1 Paraburkholderia dokdonella
104 2839746 2840030 + NZ_CP012023.1 Celeribacter marinus
105 1965633 1965923 + NZ_CP012023.1 Celeribacter marinus
106 3091902 3092192 - NZ_CP012023.1 Celeribacter marinus
107 2293862 2294149 + NZ_LN907827.1 Erwinia gerundensis
108 1328862 1329146 - NZ_CP053835.1 Arcobacter defluvii
109 523523 523807 + NC_016845.1 Klebsiella pneumoniae subsp. pneumoniae HS11286
110 210237 210527 + NC_012962.1 Photorhabdus asymbiotica
111 3604175 3604462 - NC_012962.1 Photorhabdus asymbiotica
112 38918 39205 + NZ_CP026049.1 Raoultella planticola
113 3326804 3327085 - NZ_CP070503.1 Pseudomonas atacamensis
114 2837827 2838108 - NZ_CP013461.1 Burkholderia stagnalis
115 102969 103256 - NZ_CP038855.1 Pantoea vagans
116 1212146 1212436 + NZ_CP026111.1 Paraburkholderia terrae
117 3269810 3270100 + NZ_CP009781.1 Yersinia aldovae 670-83
118 2601340 2601627 + NC_013173.1 Desulfomicrobium baculatum DSM 4028
119 414546 414836 - NZ_AP014525.1 Vibrio cholerae MS6
120 431062 431349 + NZ_AP014525.1 Vibrio cholerae MS6
121 460530 460820 + NZ_CP035689.1 Vibrio metoecus
122 1065394 1065693 - NC_014836.1 Desulfurispirillum indicum S5
123 4855551 4855838 + NZ_CP065044.1 Pectobacterium aroidearum
124 4555495 4555782 - NZ_CP065044.1 Pectobacterium aroidearum
125 1042298 1042585 + NZ_LS483470.1 Leminorella richardii
126 4819839 4820126 + NZ_CP034938.1 Pectobacterium odoriferum
127 380442 380729 + NZ_CP034938.1 Pectobacterium odoriferum
128 849902 850180 + NZ_CP035928.1 Malaciobacter pacificus
129 253292 253573 + NZ_CP017944.1 Phyllobacterium zundukense
130 1500548 1500835 - NZ_CP017689.1 Thalassotalea crassostreae
131 4107898 4108188 - NC_020908.1 Octadecabacter arcticus 238
132 4992802 4993092 - NC_020908.1 Octadecabacter arcticus 238
133 271784 272074 + NC_005126.1 Photorhabdus laumondii subsp. laumondii TTO1
134 2662395 2662682 - NC_005126.1 Photorhabdus laumondii subsp. laumondii TTO1
135 2489450 2489740 + NC_005126.1 Photorhabdus laumondii subsp. laumondii TTO1
136 202851 203132 + NZ_CP061079.1 Pseudomonas chlororaphis
137 93252 93539 + NZ_CP040428.1 Jejubacter calystegiae
138 3179495 3179776 - NZ_CP020738.1 Paraburkholderia acidophila
139 1853992 1854279 - NZ_AP022345.1 Fluviibacter phosphoraccumulans
140 1695378 1695668 + NC_004757.1 Nitrosomonas europaea ATCC 19718
141 1714296 1714592 + NC_004757.1 Nitrosomonas europaea ATCC 19718
142 1622211 1622495 + NZ_CP045300.1 Kosakonia arachidis
143 2605905 2606189 - NZ_CP042652.1 Pseudoarcobacter acticola
144 2482396 2482683 - NZ_CP065640.1 Serratia rubidaea
145 392090 392377 + NZ_CP038498.1 Pectobacterium punjabense
146 3830859 3831140 - NC_021505.1 Pseudomonas putida NBRC 14164
147 1336265 1336549 - NC_016629.1 Desulfocurvibacter africanus subsp. africanus str. Walvis Bay
148 3889 4173 - NZ_CP017756.1 Cupriavidus malaysiensis
149 2257831 2258115 - NZ_CP032097.1 Arcobacter ellisii
150 977786 978070 - NC_020304.1 Desulfocapsa sulfexigens DSM 10523
151 3104031 3104321 + NZ_CP049134.1 Paraburkholderia tropica
152 543908 544192 - NZ_CP029206.1 Actinobacillus porcitonsillarum
153 1939383 1939664 + NC_012779.2 Edwardsiella ictaluri 93-146
154 3661904 3662185 - NZ_CP006664.1 Edwardsiella anguillarum ET080813
155 613435 613731 - NZ_CP021425.1 Oleiphilus messinensis
156 502455 502739 - NZ_CP060401.1 Xenorhabdus nematophila
157 4760347 4760634 + NZ_CP011104.1 Photorhabdus thracensis
158 2396190 2396480 + NZ_CP019948.1 Methylocystis bryophila
159 3024315 3024605 + NZ_CP046909.1 Paraburkholderia acidiphila
160 1751761 1752042 - NZ_CP016043.1 Edwardsiella hoshinae
161 3420993 3421274 - NZ_CP023706.1 Edwardsiella tarda
162 2848659 2848940 - NZ_CP013416.1 Burkholderia ubonensis
163 521098 521388 + NZ_CP007201.1 Sulfurospirillum multivorans DSM 12446
164 1104284 1104565 + NZ_CP028339.1 Thauera aromatica K172
165 4450397 4450684 - NZ_CP027723.1 Pseudomonas orientalis
166 763830 764117 - NZ_LS483250.1 Moritella yayanosii
167 3661034 3661315 - NZ_CP062252.1 Pseudomonas allokribbensis
168 8582 8869 + NC_010580.1 Beijerinckia indica subsp. indica ATCC 9039
169 402193 402483 + NC_018002.1 Sulfurospirillum barnesii SES-3
170 30094 30378 + NC_011852.1 Glaesserella parasuis SH0165
171 894920 895201 + NZ_CP045302.1 Azotobacter salinestris
172 4803064 4803303 + NZ_CP045302.1 Azotobacter salinestris
173 543219 543509 + NZ_CP017111.1 Sulfurospirillum halorespirans DSM 13726
174 4506302 4506580 + NZ_AP014857.1 Escherichia albertii
175 2315170 2315454 + NZ_CP035088.1 Pseudomonas viciae
176 4002947 4003240 - NZ_LS483422.1 Providencia heimbachae
177 1481354 1481635 + NZ_HG938353.1 Neorhizobium galegae bv. orientalis str. HAMBI 540
178 1193641 1193931 + NZ_CP023464.1 Pseudoalteromonas atlantica
179 2754962 2755243 + NZ_CP011835.1 Azotobacter chroococcum
180 1534455 1534742 - NZ_CP009787.1 Yersinia rohdei
181 170008 170241 + NC_007511.1 Burkholderia lata
182 4561468 4561749 - NC_012560.1 Azotobacter vinelandii DJ
183 619814 620104 - NZ_CP010802.1 Desulfuromonas soudanensis
184 2040513 2040812 - NZ_CP041070.1 Arcobacter anaerophilus
185 2739750 2740052 + NZ_CP014646.1 Thauera humireducens
186 5197568 5197849 - NZ_CP013232.1 Collimonas fungivorans
187 2590690 2590986 - NZ_CP040517.1 Luteithermobacter gelatinilyticus
188 2055677 2055976 - NC_018691.1 Alcanivorax dieselolei B5
189 1240505 1240792 - NC_006512.1 Idiomarina loihiensis L2TR
190 672674 672973 - NC_013851.1 Allochromatium vinosum DSM 180
191 4175454 4175735 - NZ_CP012661.1 Defluviimonas alba
192 166089 166376 + NZ_CP059567.1 Neisseria shayeganii
193 3253365 3253598 + NZ_CP019240.1 Rhodoferax antarcticus
194 45534 45821 - NZ_CP023568.1 Erwinia pyrifoliae
195 10857 11144 - NZ_CP023568.1 Erwinia pyrifoliae
196 2401781 2402065 + NC_018645.1 Desulfobacula toluolica Tol2
197 3075317 3075601 + NC_018645.1 Desulfobacula toluolica Tol2
198 805153 805434 + NC_011761.1 Acidithiobacillus ferrooxidans ATCC 23270
199 1335313 1335594 + NZ_CP011504.1 Burkholderia pyrrocinia
200 1518925 1519212 - NZ_CP063164.1 Sulfurovum indicum
201 1347693 1347983 + NZ_CP012946.1 Blastochloris viridis
202 256349 256618 + NZ_CP059564.1 Alysiella filiformis
203 2229800 2230081 + NC_015942.1 Acidithiobacillus ferrivorans SS3
204 2075545 2075826 - NZ_CP011568.3 Pandoraea thiooxydans
205 3063841 3064125 + NC_017857.3 Methylophaga nitratireducenticrescens
206 4695729 4696010 - NZ_CP065838.1 Klebsiella quasipneumoniae
207 1588453 1588731 - NC_020528.1 Sinorhizobium meliloti 2011
208 2383855 2384139 - NZ_CP012543.1 Campylobacter rectus
209 5957758 5958048 + NZ_CP013480.3 Pandoraea norimbergensis
210 54320 54601 - NZ_CP012541.1 Campylobacter concisus
211 928742 929029 + NZ_CP022605.1 [Ochrobactrum] quorumnocens
212 5154049 5154330 - NZ_CP013236.1 Collimonas pratensis
213 3677639 3677923 + NZ_CP067057.1 Rahnella aceris
214 5817908 5818210 - NZ_CP048833.1 Pseudomonas multiresinivorans
215 40131 40418 - NZ_LN681226.1 Legionella hackeliae
216 1963987 1964244 - NZ_CP062804.1 Cupriavidus basilensis
217 23834 24115 + NZ_AP018688.1 Vibrio rumoiensis
218 31081 31347 + NZ_CP044485.1 Acinetobacter schindleri
219 52336 52629 - NZ_CP071768.1 Acinetobacter towneri
220 24951 25202 - NZ_CP071768.1 Acinetobacter towneri
221 1784444 1784725 - NC_013959.1 Sideroxydans lithotrophicus ES-1
222 2274280 2274573 + NZ_CP071766.1 Acinetobacter towneri
223 3970183 3970449 + NZ_CP009460.1 Dickeya fangzhongdai
224 4379370 4379669 + NC_016112.1 Methylotuvimicrobium alcaliphilum 20Z
225 3252809 3253102 + NZ_CP062147.1 Komagataeibacter hansenii
226 4670747 4671046 + NZ_CP035467.1 Methylotuvimicrobium buryatense
227 499325 499573 + NZ_LR134340.1 Escherichia marmotae
228 682499 682768 + NZ_CP046027.1 Neisseria brasiliensis
229 111617 111901 - NZ_CP040760.1 Paracoccus liaowanqingii
230 1348358 1348645 - NC_007969.1 Psychrobacter cryohalolentis K5
231 1524603 1524890 + NC_007204.1 Psychrobacter arcticus 273-4
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Neighborhood Conservation Analysis
* Arrows marked in Genome Diagram shows ORFs; Multiple PFAMs can be mapped to a single ORF.
* 'Small ORF' represents the entry/query analyzed.
* Image generated using 'gggenes'(R-Package).
Neighborhood Conservation Analysis
Neighborhood Representative Chosen(Species): NZ_CP034150.1
Sr.No. Domain Co-occurrence Frequency No. of species in which domain occurs with smORF Median distance b/w smORF and domain bearing ORFs Orientation relative to smORF PFAM Information
1 PF02604.21 0.65 124 -10 same-strand Antitoxin Phd YefM, type II toxin-antitoxin system
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